#content{
    margin-top:50px;
    margin-left:425px;
    height:800px;
    width:700px;
    border-radius: 10px;
    box-shadow: 5px 5px 5px #888;
    background-color: #edeffb;
}
.register {
    margin-left:200px;
    padding-top:20px;
}
#denglu{
    margin-left:300px;
    border-radius:10px;
    border:0;/*边框宽度0*/
    height:50px;
    width:90px;
    padding:5px 10px;/*上下填充10 左右5*/
    font-size: 20px;
}